Dual Three-phase PMSM Research Articles

Fault-Tolerant Control of Dual Three-Phase PMSM Based on Minimum Copper Loss Under Multi-Phase Open and Open-Switch Faults

Fault-Tolerant Control of Dual Three-Phase PMSM Based on Minimum Copper Loss Under Multi-Phase Open and Open-Switch Faults

Low-noise sensorless control of dual three-phase PMSM based on discontinuous signal injection

Low-noise sensorless control of dual three-phase PMSM based on discontinuous signal injection

A Computationally Efficient Model Predictive Control Method for Dual Three-Phase PMSM of Electric Vehicle With Fixed Switching Frequency

Aiming at the problems of large harmonic current, unfixed switching frequency and heavy calculation burden in the model predictive current control (MPCC) methods of dual three-phase permanent magnet synchronous motor (DT-PMSM). This paper presents a computationally efficient MPCC method with a fixed switching frequency. Firstly, the virtual voltage vectors (V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> s) are synthesized by two large vectors and two medium-small vectors. The V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> s effectively reduce the harmonic currents, and the goal of the synthetic V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> is that the harmonic current in the x-y subspace is zero. Therefore, the weighting factor of the harmonic term is eliminated in the cost function. Secondly, an optimal voltage vector selection method is designed to reduce the candidate voltage vectors in the control set and relieves the calculation burden. In addition, to further reduce ripple current and torque ripple, the duty cycle modulation method is introduced to calculate the dwell time of the V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> . The zero vector is inserted in the middle and both sides of the V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> s to achieve the purpose of fixing the switching frequency. Finally, the effectiveness of the proposed method is verified by experiments.

An Improved Torque Enhancement Strategy for Dual Three-Phase PMSM Based on Model-Free Predictive Current Control

An Improved Torque Enhancement Strategy for Dual Three-Phase PMSM Based on Model-Free Predictive Current Control

Harmonic Subspace Signature-Based Detection and Localization of Inter-Turn Short Circuit Fault for Dual Three-Phase PMSM With VSD Scheme

Harmonic Subspace Signature-Based Detection and Localization of Inter-Turn Short Circuit Fault for Dual Three-Phase PMSM With VSD Scheme

High Frequency Harmonics Dispersion for Dual Three-Phase PMSM Drives With Random Switching Sequence

High Frequency Harmonics Dispersion for Dual Three-Phase PMSM Drives With Random Switching Sequence

Fault-Tolerant Optimization Control of Open-Winding Dual Three-Phase PMSM Drives in Full Operation Range

Fault-Tolerant Optimization Control of Open-Winding Dual Three-Phase PMSM Drives in Full Operation Range

Natural Fault-Tolerant Control With Minimum Copper Loss in Full Torque Operation Range for Dual Three-Phase PMSM Under Open-Circuit Fault

Natural Fault-Tolerant Control With Minimum Copper Loss in Full Torque Operation Range for Dual Three-Phase PMSM Under Open-Circuit Fault

Torque Ripple Suppression in the Full Torque Operation Range for Dual Three-Phase PMSM Under Single-Phase Open-Circuit Fault

Torque Ripple Suppression in the Full Torque Operation Range for Dual Three-Phase PMSM Under Single-Phase Open-Circuit Fault

Optimized Control Set Model Predictive Control for Dual Three-Phase PMSM With Minimum Error Duty Cycle Regulation

Optimized Control Set Model Predictive Control for Dual Three-Phase PMSM With Minimum Error Duty Cycle Regulation

Current Harmonic Minimum Pulse Width Modulation for Dual Three-phase PMSM System with 3L-NPC Inverter and Output Filter

Current Harmonic Minimum Pulse Width Modulation for Dual Three-phase PMSM System with 3L-NPC Inverter and Output Filter

Extended Minimum Copper Loss Range Fault-Tolerant Control for Dual Three-Phase PMSM

Extended Minimum Copper Loss Range Fault-Tolerant Control for Dual Three-Phase PMSM

Open-Phase Fault and Current Sensor Fault Diagnosis Based on Spatial Distributions of Phase Currents for Dual Three-Phase PMSM Drives

Open-Phase Fault and Current Sensor Fault Diagnosis Based on Spatial Distributions of Phase Currents for Dual Three-Phase PMSM Drives

Acoustic Noise Reduction for Low-Speed Sensorless Operation of Dual Three-Phase PMSM With Random Winding Injection

This paper proposes a pseudorandom sinusoidal voltage signal with random winding injection method to improve the acoustic noise reduction performance for the dual three-phase permanent magnet synchronous motor (DTP-PMSM). Compared to the conventional pseudorandom frequency sinusoidal injection method, the proposed method achieves better noise reduction with similar performance in position estimation. Two fixed frequency signals are randomly selected as injection signals. Then, one of the two sets of windings of the DTP-PMSM is randomly chosen for injection. Due to this unique injection scheme, the injected frequency component in the response current can be reduced. Two pseudorandom numbers are generated synchronously by the digital signal system. The first random number selects two voltage signals with different frequencies. Meanwhile, one of the two sets of windings is chosen by the second random number. Thus, there is only one winding with the injection signal at a certain time. In addition, the power spectral density of the response current caused by the injected signal is analyzed. Finally, the experimental results verify the proposed method.

Optimization of Torque Ripple for Low-Carrier-Ratio Dual Three-Phase PMSM With Pulse Pattern Control

Optimization of Torque Ripple for Low-Carrier-Ratio Dual Three-Phase PMSM With Pulse Pattern Control

Current Harmonics and Unbalance Suppression of Dual Three-Phase PMSM Based on Adaptive Linear Neuron Controller

A strategy of current harmonics and unbalance suppression based on the vector space decomposition control with adaptive linear neuron (ALN) controller for the dual three-phase permanent magnet synchronous machine (DTP-PMSM) drive system is proposed in this paper. According to the conventional vector space decomposition theory, the compensation voltages from the ALN controller in the dq-frame and dqz-frame are employed to suppress the 5th and 7th current harmonics and unbalances. Compared with the VSD control using only the PI controller, the current harmonics and unbalance are sufficiently suppressed in the proposed strategy. In addition, unlike the resonant controller discretized by conventional Tustin transformation, the ALN controller has no resonant pole shift to the desired resonant frequency. Therefore, the harmonic suppression effect of the proposed strategy exhibits better performance than the VSD control with the resonant controller, especially in the high-speed region. Finally, the feasibility and effectiveness of the proposed strategy are validated by experimental results under both steady and transient states.

Sensorless control of dual three-phase permanent magnet synchronous motor based on speed feedback and frequency-variable tracking.

The dual three-phase Permanent Magnet Synchronous Motor (PMSM) control system is characterized by its high reliability, slight torque fluctuation and low harmonic content. It is very suitable for systems requiring high power output and high reliability, for instance, electric vehicles, aerospace and military equipment. In this paper, a full speed domain sensorless control technology for dual three-phase PMSM is proposed which solves the limitations of other sensorless controls, improves system accuracy and stability, and has high practicality in fields such as new energy vehicles. The mathematical model of this motor in a static coordinate system is established, and the sine and cosine signals along with the velocity and angle information are obtained by using the flux linkage observer. Moreover, the estimated angle error parameter is introduced into the flux linkage observer; as a result, the estimation accuracy is improved by the estimated speed feedback, and the current frequency is tracked by the stator current Frequency-Variable Tracker (FVT) to reduce the current error. Meanwhile, to make the observer's estimation more accurate and to improve its ability to resist disturbance, a rotor disturbance is added to act as a disturbance variable. Through the mechanical motion equation of the motor, a fourth-order Extended State Observer (ESO) is built to calculate the rotor position and speed. Finally, the technology accuracy is verified using simulation and experimental results. The findings prove that the sensorless detection technology, with speed feedback introduce in this paper, has good reliability and high precision for dual three-phase PMSM under dynamic and static conditions.

A Novel Winding Connection Sequence of Dual Three-Phase Series-End Winding PMSM Drive for Speed Range Extension

Series-end winding motor drives double the dc-link voltage utilization compared with the conventional star-connected winding counterparts, which indicates that series-end winding motor drives are suitable for high-speed applications with limited dc-link voltage. To further improve the dc-link voltage utilization and extend the speed range of the dual three-phase series-end winding permanent magnet synchronous motor (DTSW-PMSM) drive system, this paper proposes a novel winding connection sequence (WCS) for DTSW-PMSM drive, and the dc-link voltage utilization is further improved by 36.6% compared with the normal WCS. The dc-link voltage utilizations of different WCSs are analyzed through the phasor relationship between the phase and leg voltages. Besides, the corresponding carrier-based pulse-width modulation to drive the DTSW-PMSM with the proposed WCS is also developed. In the experimental tests, the speed range of the DTSW-PMSM drive with the proposed WCS is extended significantly. Therefore, adopting the proposed WCS can be an effective means for further speed range extension of DTSW-PMSM drives without additional hardware.

Extended State Observer-Based Predictive Current Control for Dual Three-Phase PMSM with High Dynamic Performance

Model predictive controllers are widely discussed in the field of dual three-phase permanent magnet synchronous motor control. However, conventional predictive current controllers usually suffer from parameter inaccuracies or model uncertainties, resulting in prediction errors and deterioration of control performance. Therefore, in this paper, an extended state observer-based (ESO) model predictive current controller is proposed to effectively improve the dynamic performance of the motor and its robustness to parameters or disturbances. Parameter inaccuracies or model uncertainties are considered to be lumped disturbances and expressed in the modified mathematical model of the motor. Then, with the designed observer estimating the external disturbances in real time, the prediction error is compensated and corrected periodically. Additionally, the parameter design method of the observer is presented to simplify the controller design. Finally, comparative experiments are implemented to sufficiently demonstrate the effectiveness of the proposed method for dynamic performance improvement as well as for parameter robustness. The results show that the proposed method takes only 17μs of computation time with a closed-loop bandwidth of 1839rad/s. In addition, the maximum d-axis following error of the proposed method is only 0.10A in the load dynamics experiments, which is a significant improvement compared to the 0.79A of the traditional proportional-integral controller.

Maximum-Torque Optimization Control of Dual Three-Phase PMSM in Low-Frequency and Static Operations

Maximum-Torque Optimization Control of Dual Three-Phase PMSM in Low-Frequency and Static Operations